During normal air conditioning system operation,system mode doors are
A) fully opened.
B) fully closed.
C) partially closed.
D) all of the above, depending on the mode selected.

Question

Quizplus · Accepted Answer

The system mode doors can be fully opened, fully closed or partially closed depending on the mode selected. For example, in the cooling mode, the evaporator air door and the recirculation air door would be fully opened, while the heater air door and fresh air door would be fully closed. In other modes like defrost or vent, some doors may be partially closed to control the airflow. Therefore, option D is the best choice.

During Normal Air Conditioning System Operation,system Mode Doors Are